Intensive Care Unit Acquired Weakness(ICUAW) encompasses a spectrum of disorders characterized by generalized weakness developing after the onset of critical illness. Pediatric data on the incidence of ICUAW is restricted to isolated case reports and case series of no more than five children. Critical illness polyneuropathy is characterized by reduction in compound motor action potential or sensory nerve action potential or both with preserved conduction velocity on electrophysiological studies. These findings can occur very early prior to the onset of clinical features. Given the dearth of data in children on the subject, this study has been planned to evaluate the incidence of critical illness associated polyneuropathy /myopathy in severely sick children admitted.